INGREDIENTS
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2 cups all-purpose flour
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1/2 teaspoon baking soda
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1/2 teaspoon cream of tartar
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1 teaspoon baking powder
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large pinch salt
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1 cup butter, softened at room temperature
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1/2 cup packed light brown sugar
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1 cup white sugar
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2 eggs and 1 yolk
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1teaspoon mint extract
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12 drops green food coloring
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1 (12oz) bag large chunk dark chocolate